prm_to_uac2() is broken because it tests against pointer it itself
mapped onto, which will never be different.
Fix the mapping by adding pointer to parent chip in each rtd param
and removing the prm_to_uac2().
Reported-by: NJulien Rouviere <jrouviere@qualistream.com>
Signed-off-by: NJassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>